The Harken Black Magic Air Blocks have been redesigned with a sleek new look. Their unique, performance packed engineering remains exactly the same.
Used on offshore boats, these strong, lightweight blocks feature free-rolling, high load Torlon® roller bearings for a high strength-to-weight ratio and reduced wear. Rollers are housed in a center cage and stay parallel for low-friction efficiency. Sculpted hardcoat-anodized aluminum sideplates protect sideload ball bearings. Dissimilar metals are isolated to minimize corrosion.
Like all Air Blocks, the three-way head can be locked in either direction or can swivel freely to keep line from twisting.
Sheets, Halyards, Running Backstays, Control Lines
|Sheave Diameter||3 15/16 in||100 mm|
|Max Line Diameter||5/8 in||16 mm|
|Max Working Load||7,500 lb||3,402 kg|
|Breaking Load||15,000 lb||6,804 kg|
|Weight||31.18 oz||884 g|
|Length||7 11/16 in||195 mm|
|A (refer to picture)||3 21/32 in||93 mm|
|B (refer to picture)||3 27/32 in||97 mm|
|C (refer to picture)||2 5/16 in||59 mm|
Includes Padeye - Uses hole spacing and base dimensions of 648 padeye.
MAXIMUM WORKING LOAD DECREASES AT VARYING ANGLES